a tubular main portion having a central axis, an internal surface and an external surface, and at least one raised feature extending from the external surface and running entirely around the external surface in a helical or circumferential direction relative to the central axis a surface plane of said main portion, said main portion and said at least one raised feature comprising polymer matrix material containing fiber reinforcement;

wherein the at least one raised feature is exposed to impacts on the external surface of the tubular main portion and arranged to incur visually perceptible damage when the component is subject to an impact with an energy above a predetermined impact energy threshold and to resist an impact with an energy below the predetermined impact energy threshold;

wherein the at least one raised feature has a height above the surface plane and the main portion has a thickness below the surface plane at a position aligned with the at least one raised feature, the thickness and the height being measured from a cross-section taken through the surface plane;

wherein the height is the same as or greater than the thickness; and

wherein the fiber reinforcement is chopped fiber reinforcement.